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<div class="title">lapacke_helpers.h</div>  </div>
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<div class="contents">
<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">// This file is part of Eigen, a lightweight C++ template library</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment">// for linear algebra.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment">// Copyright (C) 2021 Erik Schultheis &lt;erik.schultheis@aalto.fi&gt;</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment">// This Source Code Form is subject to the terms of the Mozilla</span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment">// Public License v. 2.0. If a copy of the MPL was not distributed</span></div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment">// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.</span></div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160; </div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="preprocessor">#ifndef EIGEN_LAPACKE_HELPERS_H</span></div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="preprocessor">#define EIGEN_LAPACKE_HELPERS_H</span></div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160; </div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="preprocessor">#include &quot;./InternalHeaderCheck.h&quot;</span></div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160; </div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="preprocessor">#ifdef EIGEN_USE_MKL</span></div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="preprocessor">#include &quot;mkl_lapacke.h&quot;</span></div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="preprocessor">#else</span></div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;<span class="preprocessor">#include &quot;lapacke.h&quot;</span></div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160; </div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespaceEigen.html">Eigen</a> {</div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="keyword">namespace </span>internal {</div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;<span class="keyword">namespace </span>lapacke_helpers {</div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160; </div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;<span class="comment">// ---------------------------------------------------------------------------------------------------------------------</span></div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;<span class="comment">//                  Translation from Eigen to Lapacke for types and constants</span></div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;<span class="comment">// ---------------------------------------------------------------------------------------------------------------------</span></div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160; </div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;<span class="comment">// For complex numbers, the types in Eigen and Lapacke are different, but layout compatible.</span></div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;<span class="keyword">template</span>&lt;<span class="keyword">typename</span> Scalar&gt;</div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;<span class="keyword">struct </span>translate_type_imp;</div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;<span class="keyword">template</span>&lt;&gt;</div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;<span class="keyword">struct </span>translate_type_imp&lt;float&gt; {</div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;    <span class="keyword">using</span> type = float;</div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;};</div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;<span class="keyword">template</span>&lt;&gt;</div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;<span class="keyword">struct </span>translate_type_imp&lt;double&gt; {</div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;    <span class="keyword">using</span> type = double;</div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;};</div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;<span class="keyword">template</span>&lt;&gt;</div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;<span class="keyword">struct </span>translate_type_imp&lt;std::complex&lt;double&gt;&gt; {</div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;    <span class="keyword">using</span> type = lapack_complex_double;</div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;};</div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;<span class="keyword">template</span>&lt;&gt;</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;<span class="keyword">struct </span>translate_type_imp&lt;std::complex&lt;float&gt;&gt; {</div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;    <span class="keyword">using</span> type = lapack_complex_float;</div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;};</div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160; </div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;<span class="keyword">template</span>&lt;<span class="keyword">typename</span> Scalar&gt;</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;<span class="keyword">using</span> translated_type = <span class="keyword">typename</span> translate_type_imp&lt;Scalar&gt;::type;</div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160; </div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;<span class="keyword">template</span>&lt;<span class="keyword">typename</span> Source, <span class="keyword">typename</span> Target=translated_type&lt;Source&gt;&gt;</div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;EIGEN_ALWAYS_INLINE <span class="keyword">auto</span> to_lapack(Source value) { <span class="keywordflow">return</span> <span class="keyword">static_cast&lt;</span>Target<span class="keyword">&gt;</span>(value); }</div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160; </div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;<span class="keyword">template</span>&lt;<span class="keyword">typename</span> Source, <span class="keyword">typename</span> Target=translated_type&lt;Source&gt;&gt;</div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;EIGEN_ALWAYS_INLINE <span class="keyword">auto</span> to_lapack(Source *value) { <span class="keywordflow">return</span> <span class="keyword">reinterpret_cast&lt;</span>Target*<span class="keyword">&gt;</span>(value); }</div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160; </div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;EIGEN_ALWAYS_INLINE lapack_int to_lapack(<a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a> index) {</div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;  <span class="keywordflow">return</span> convert_index&lt;lapack_int&gt;(index);</div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;}</div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160; </div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;<span class="keyword">template</span>&lt;<span class="keyword">typename</span> Derived&gt;</div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;EIGEN_ALWAYS_INLINE EIGEN_CONSTEXPR lapack_int lapack_storage_of(<span class="keyword">const</span> EigenBase&lt;Derived&gt; &amp;) {</div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;  <span class="keywordflow">return</span> Derived::IsRowMajor ? LAPACK_ROW_MAJOR : LAPACK_COL_MAJOR;</div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;}</div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160; </div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;<span class="keyword">template</span>&lt;UpLoType mode&gt; <span class="keywordtype">char</span> translate_mode;</div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;<span class="keyword">template</span>&lt;&gt; constexpr <span class="keywordtype">char</span> translate_mode&lt;Lower&gt; = <span class="charliteral">&#39;L&#39;</span>;</div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;<span class="keyword">template</span>&lt;&gt; constexpr <span class="keywordtype">char</span> translate_mode&lt;Upper&gt; = <span class="charliteral">&#39;U&#39;</span>;</div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160; </div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160; </div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;<span class="comment">// ---------------------------------------------------------------------------------------------------------------------</span></div>
<div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;<span class="comment">//              Automatic generation of low-level wrappers</span></div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;<span class="comment">// ---------------------------------------------------------------------------------------------------------------------</span></div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160; </div>
<div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;<span class="keyword">template</span>&lt;<span class="keyword">typename</span> DoubleFn, <span class="keyword">typename</span> SingleFn, <span class="keyword">typename</span> DoubleCpxFn, <span class="keyword">typename</span> SingleCpxFn&gt;</div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;<span class="keyword">struct </span>WrappingHelper {</div>
<div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;  <span class="comment">// The naming of double, single, double complex and single complex is purely for readability</span></div>
<div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;  <span class="comment">// and doesn&#39;t actually affect the workings of this class. In principle, the arguments can</span></div>
<div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;  <span class="comment">// be supplied in any permuted order.</span></div>
<div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;  DoubleFn double_; SingleFn single_; DoubleCpxFn double_cpx_; SingleCpxFn single_cpx_;</div>
<div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160; </div>
<div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;  <span class="keyword">template</span>&lt;<span class="keyword">typename</span>... Args&gt;</div>
<div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;  <span class="keyword">auto</span> call(Args&amp;&amp;... args) -&gt; decltype(double_(std::forward&lt;Args&gt;(args)...)) {</div>
<div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;    <span class="keywordflow">return</span> double_(std::forward&lt;Args&gt;(args)...);</div>
<div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;  }</div>
<div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160; </div>
<div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;  <span class="keyword">template</span>&lt;<span class="keyword">typename</span>... Args&gt;</div>
<div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;  <span class="keyword">auto</span> call(Args&amp;&amp;... args) -&gt; decltype(single_(std::forward&lt;Args&gt;(args)...)){</div>
<div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;    <span class="keywordflow">return</span> single_(std::forward&lt;Args&gt;(args)...);</div>
<div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;  }</div>
<div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160; </div>
<div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;  <span class="keyword">template</span>&lt;<span class="keyword">typename</span>... Args&gt;</div>
<div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;  <span class="keyword">auto</span> call(Args&amp;&amp;... args) -&gt; decltype(double_cpx_(std::forward&lt;Args&gt;(args)...)){</div>
<div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;    <span class="keywordflow">return</span> double_cpx_(std::forward&lt;Args&gt;(args)...);</div>
<div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;  }</div>
<div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160; </div>
<div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;  <span class="keyword">template</span>&lt;<span class="keyword">typename</span>... Args&gt;</div>
<div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;  <span class="keyword">auto</span> call(Args&amp;&amp;... args) -&gt; decltype(single_cpx_(std::forward&lt;Args&gt;(args)...)){</div>
<div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;    <span class="keywordflow">return</span> single_cpx_(std::forward&lt;Args&gt;(args)...);</div>
<div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;  }</div>
<div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;};</div>
<div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160; </div>
<div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;<span class="keyword">template</span>&lt;<span class="keyword">typename</span> DoubleFn, <span class="keyword">typename</span> SingleFn, <span class="keyword">typename</span> DoubleCpxFn, <span class="keyword">typename</span> SingleCpxFn, <span class="keyword">typename</span>... Args&gt;</div>
<div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;EIGEN_ALWAYS_INLINE <span class="keyword">auto</span> call_wrapper(DoubleFn df, SingleFn sf, DoubleCpxFn dcf, SingleCpxFn scf, Args&amp;&amp;... args) {</div>
<div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;  WrappingHelper&lt;DoubleFn, SingleFn, DoubleCpxFn, SingleCpxFn&gt; helper{df, sf, dcf, scf};</div>
<div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;  <span class="keywordflow">return</span> helper.call(std::forward&lt;Args&gt;(args)...);</div>
<div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;}</div>
<div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160; </div>
<div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;<span class="preprocessor">#define EIGEN_MAKE_LAPACKE_WRAPPER(FUNCTION) \</span></div>
<div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;<span class="preprocessor">template&lt;typename... Args&gt; \</span></div>
<div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;<span class="preprocessor">EIGEN_ALWAYS_INLINE auto FUNCTION(Args&amp;&amp;... args) { return call_wrapper(LAPACKE_d##FUNCTION, LAPACKE_s##FUNCTION, LAPACKE_z##FUNCTION, LAPACKE_c##FUNCTION, std::forward&lt;Args&gt;(args)...); }</span></div>
<div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160; </div>
<div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;<span class="comment">// Now with this macro and the helper wrappers, we can generate the dispatch for all the lapacke functions that are</span></div>
<div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;<span class="comment">// used in Eigen.</span></div>
<div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;<span class="comment">// We define these here instead of in the files where they are used because this allows us to #undef the macro again</span></div>
<div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;<span class="comment">// right here</span></div>
<div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;EIGEN_MAKE_LAPACKE_WRAPPER(potrf)</div>
<div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;EIGEN_MAKE_LAPACKE_WRAPPER(getrf)</div>
<div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;EIGEN_MAKE_LAPACKE_WRAPPER(geqrf)</div>
<div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160; </div>
<div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;<span class="preprocessor">#undef EIGEN_MAKE_LAPACKE_WRAPPER</span></div>
<div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;}</div>
<div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;}</div>
<div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;}</div>
<div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160; </div>
<div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;<span class="preprocessor">#endif </span><span class="comment">// EIGEN_LAPACKE_HELPERS_H</span></div>
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